Ответ:
1. I'm not reading these books today.
Общий: Aren’t I reading these books today?/ Am I not reading these books today?
Специальный: When am I not reading these books?
Вопрос к подлежащему: Who is not reading these books today?
Альтернативный: Am I not reading these books or magazines today?
Разделительный: I’m not reading these books today, am I?
2. He must work hard today.
Общий: Must he work hard today?
Специальный: When must he work hard?
Вопрос к подлежащему: Who must work hard today?
Альтернативный: Must he or she work hard today?
Разделительный: He must work hard today, mustn’t he?
3. They had been to Tokyo.
Общий: Had they been to Tokyo?
Специальный: Where had they been to?
Вопрос к подлежащему: Who had been to Tokyo?
Альтернативный: Had they been to Tokyo or Milan?
Разделительный: They had been to Tokyo, hadn’t they?
4. She had many relatives abroad.
Общий: Did she have many relatives abroad?
Специальный: Where did she have many relatives?
Вопрос к подлежащему: Who had many relatives abroad?
Альтернативный: Did she have many relatives or friends abroad?
<em>Разделительный</em>: She had many relatives abroad, didn’t she?